New Features and Important Changes in GammaLib 1.7.3 2 December 2020 1. Introduction --------------- This document briefly summarizes module by module the most important changes made since the last release of GammaLib. 2. Public interface modifications --------------------------------- The following classes have been added: - none The following classes have been removed: - none The following classes have been renamed: - none The following methods have been added: - none The following methods have been removed: - none The following methods have been renamed: - none The arguments for the following methods have been changed: - none The return value of the following methods has been changed: - none 3. Configuration ----------------- None 4. Application module --------------------- None 5. Base module -------------- None 6. FITS I/O Interface --------------------- None 7. Linear algebra module ------------------------ None 8. Model module --------------- None 9. Numerics module ------------------ None 10. Observation module ---------------------- None 11. Optimization module ----------------------- None 12. Sky module -------------- None 13. Support module ------------------ None 14. XML module -------------- None 15. VO module ------------- None 16. Xspec module ---------------- None 17. Test module --------------- None 18. Multi-wavelength interface ------------------------------ None 19. Fermi-LAT interface ----------------------- None 20. CTA interface ----------------- The GCTAModelIrfBackground::eval() method uses now the GCTABackground3D::rate_ebin() integrator method instead of the GCTABackground3D::operator() operator so that the background model evaluation is no longer sensitive to the number of energy bins. The GCTACubeBackground::fill() method was simplified, removing the power law integration which was not accurate enough, and using directly the GCTAModelIrfBackground::eval() method which is now exact (#3472). 21. COMPTEL interface --------------------- None 22. INTEGRAL/SPI interface -------------------------- None